1. National Center for Mining Technology, King Abdulaziz City of Science and Technology (KACST), Riyadh, Saudi Arabia
2. Geohazards Research Center, King Abdulaziz University (KAU), Jeddah, Saudi Arabia
3. National Research Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt
4. Sperry Drilling Svc-Halliburton Saudi